Broom winding machine



y 6 B. KQBACK 2,937,900

BROOM WINDING MACHINE Filed Aug. 21, 1957 3 SheetsSheet l g fi/fl/ I vINVENTOR.

\ 4 BENJAMIN KOBACK B. KOBACK BROOM WINDING MACHINE May 24, 1960 3Sheets-Sheet 2 Filed Aug. 21, 1957 K m 4 m w 5 6 6 W W M m J UnitedStates Patent 2,931,900 BROOM wmnmc MACHINE Benjamin Koback, 8028 N.Jersey, Portland, o

me Aug. 21, 1951, s". No. mass 4 Claims. (Cl. 300-14) The presentinvention relates to broom winding machines, and'more particularly to amachine for winding bristles on the cores of rotary brooms of the typeused in street sweepers, polishers, cleaning machines and the like.

The primary object of the invention is to provide automatic means forfeeding bristles and tying bristles into the groove of the core in acontinuous operation.

A further object of the invention is to 'lock the bristles inthe'grooves of the core by rope or cable while delivering the bristlesto the core.

Another object of the invention is to provide a trimming device fortrimming the ends of the bristles to the proper length simultaneouslywith the winding of the core.

A still further object of the invention is to provide chains for feedingthe bristles into the grooves of the core, the chains having guidesthereon for maintaining the bristles in the proper position of alignmentwhile feeding them into the groove. By the use of chains, the positionand feeding of the bristles can be accurately controlled while applyingthem to the grooves of the core and binding them into the grooves.

One of the objects of this invention is to provide a method of feedingthe bristles into the spiral grooves formed on the core of the brushwherein the spirals feed the bristle applicator along the core in theapplying of the bristles to the core.

A still'further object of the invention is to provide an adjustabletension applied to the binding rope through a fair-lead drum having abrake associated therewith.

Other objects and advantages will become apparent in the followingspecification when considered in the light of the attached "drawings, inwhich:

Figure l is a front elevation of the machine illustrating a brush coremounted therein in alignment with the bristle feeding mechanism.

Figure 2 is an end view of the machine shown: in Fi'ure l.

. igure 3 is an enlarged sectional view of the bristle feeding assembly,taken on theline 3-3 of Figure], looking in the direction indicated. I

Figure 4 is ,a plan view of the machine with parts broken away forconvenience of illustration. I

Figure 5 isa fragmentary enlarged sectional view, taken on the line 5-5of Figure 2, looking in the direction indicated.

Figure 6 is an enlarged fragmentary sectional view, taken on the line6-6 of Figure 1, looking in the direction indicated.

Figure 7 is an enlarged detail side view of the bristle feeding chains.

Figure 8 is a plan view of a section of chain.

Figure 9 is a sectional view, taken on the line 9-9 of Figure 7, lookingin the direction indicated.

' Figure 10 is an enlarged fragmentary sectional view, taken on the line10-10 of Figure 3, looking in the direction indicated.

Figure 11 is a face view oftbe bristle trimming device.

ice

Figure 12 is a plan view of the structure shown in Figure 11. I I

Figure 13 is a fragmentary sectional view taken on the line 13-13 ofFigure 14, looking in the direction indicated.

' Figure 14 is a fragmentary side elevation of the brake applying deviceillustrated 'in- Figure 13.

Figure 15 is an end sectional view, taken on the line 15-15 of Figure 1,looking in the direction indicated.

Figure-16 is a fragmentary enlarged side view of the discharge end ofthe bristle feeding assembly.

Referring now to the drawings in detail. wherein like reference numeralsindicate like-parts throughout the several figures, the referencecharacter W indicates generally a broom winding machine which includes aframe F. The frame F has a pair of horizontally disposed channel ironbase members 20 running parallel to one another. Vertical disposed posts21 are fixedly secured to the ends of the base member 20, as by weldingor any other suitable means. Vertical posts 22 also are disposed ateither end of the base members 20 and extend to a lesser height than thepost 21 to the point 23.

Transverse end frame members 24 are fixedly secured to the upper ends ofthe posts 21 and to extensions 25 disposed at an angle to the verticalat their opposite ends. Upper horizontally disposed frame members 26 and27 connect the upper ends of the channel legs 21 and 22. The upper framemembers 26 and 27 provide rails upon which a carriage C is supported tooperate longitudinally of the framework F of the machine W.

Referring particularly to Figure 6, the carriage C includes a platform28 which rests upon horizontal frames 29. Trunnion wheels 30 are fixedlymounted to a downwardly extending portion 31 of the frames 29 and travelwithin channel way 32 of the frame me'mbers 26 and 27. Fixedly securedto the underside of the horizontal frames 29 is a downwardly extendingpanel 33, the purpose of which will be more fully described below.

A bristle feeding assembly B is supported by the carriage C and is movedalong the upper rails 26 and 27 of the frame F in the operation of themachine W. The bristle assembly B has a flat table 34, referring .toFigure 3, which extends from an outer end 35 to the point 36. Extendingfrom the point 36 of the table are side frames 37 which, referring toFigure 10, connect the upper angle bars 38 and the lower angle bars 39together by welding 40. 1

The side frames 37 and angle bars 38 and 39 are connected at their innerend at the point 36, by welding. They are spaced apart by a transversebar 41, which is secured to the lower angle bars 39 by legs 42 weldedthereto. It will be noted that the outer ends 43 of the angle bars 38,39 converge towards one another, referring particularly to Figure 4. Theobject of which will be 55 later described.

The table 34 is supported by hanger bars 44 secured at 45 to thecarriage C and to the table 34 at the point 46. The ends 43 of the anglebars 38, 39 are supported by the adjustable hanger rods 47. The hangerrods 47 have threaded tubular members 48 fixedly secured at 49 to theouter ends 43 of the hanger bars 38 and 39.

The upper ends of the hanger bars 47 have threaded tubular members 50pivotally connected to the carriage C at 51, referring particularly toFigures 1 and 2. Dis posed between the threaded tubular members 48 and50 is a threaded rod 52 having a hand wheel 53 forming part thereof sothat the same can be rotated in either direction to raise or lower theouter ends 43 of the bars 38 and 39 in the operation of the machine W.

Referring to Figures 3, 4 and 10, endless chains 54 are trained aboutdriving sprockets 55 keyed to a shaft 56 journalled in bearings 57fixedly mounted to the underaos'moo side of the table 34. The shaft 56is driven by a motor 58 through a reduction gear box 59 and chain 60.The motor 58'is mounted to a bracket 61, which in turn is supported bythe table 34. The opposite end portions of the chains 54 are trainedabout the idler sprockets 62 journalled on stub shafts 63, the shafts 63being firmly secured to brackets 64 on the outer ends 43 of the rails 38and 39.

Referring to Figures 7, 8 and 9, the endless chains 54 have horizontalfingers 65 extending inwardly towards one another. Fingers 66 extendverticallly from the chains 54 and form part of the fingers 65. Theobject of the fingers 65 and 66 is to move the bristles 67 along withthe movement of the upper run of the chains 54 to their finaldestination in a manner to be described later on.

The means of mounting the core 68 within the framework F of the machineW will now be described, referring to Figures -1, 3 and 5. An arborshaft 69 is journalled within bearings 70 fixedly secured to thevertical posts 22 and 22A. A tail stock 71 is journalled within bearings72 fixedly secured to the carriage 73. The carriage 73, referringparticularly to Figure 15, is supported by trunnion wheels 74 journalledto the base 75 of the carriage 73 and operate within channel ways 76 ofthe base frame 20. An adjustable brace 77 is fixedly secured to theupper edge of the carriage 73 at 78 and has a trunnion wheel 79operating within the channel way 76 of the base frame 20 for maintainingthe carriage 73 in a vertical position.

The adjustable brace 77 has .an adjusting hand wheel 77' for varying thelength of the brace 77 for aligning the tail stock 71 with the arbor 69.In the operation of the machine W there is a side strain applied to thisassembly, and when this strain is applied it tends to move the tailstock 71 out of line, therefore an adjustment must be providedforoffsetting this side pull.

Referring to Figure 5, the core 68 of the broom has a hollow center 80into which the hub 81 is secured by the cap screws 81 holding the hub 81in position. The arbor shaft 69 has an integral flange 69' forming partthereof. A shaft 68' passes through the hub 81 extending into the hollowarbor 69 which accurately centers the core 68 with the arbor 69. Theflange 69' of the arbor 69 is bolted to the hub 81 by the cap screws81". The tail stock 71 has a hollow chuck 82 which receives the oppositeend of the shaft 68' and the chuck 82 is maintained against the end ofthe shaft by the fixed collar 83 hearing against one of the bearings 72.

When the carriage 73 is brought to the proper position for supportingthe brush core 68, the hand wheel 84 is revolved, bringing the set screw85 down against the top of the rail 20, preventing the movement of thecarriage 73. The arbor shaft 69 is revolved by the motor 86 and gearreduction box 87 through the chain 88.

In the applying of bristles to the core 68, the bristle feeding assemblyB is moved along the core 68 in the following manner, referringparticularly to Figures 3 and 10. A downwardly extending arm 89 isindirectly secured to the transverse bar 41, forming part of the b1'i&tle feeding assembly B, as above described. The arm 89 supports a pairof tandem wheels 90 journalled within a wheel supporting frame 91.

The frame 91 is pivotally mounted by its bracket 92 to the lower end ofthe arm 89 at 93. This permits the tandem wheels 90 to follow the spiralgrooves 94 on the periphery of the core 68, as best illustrated inFigure 10. As the wheels 90 follow the groove 94 they will move thebristle feeding assembly B along the core 68 while applying the bristles67 to the core 68. The tandem wheels 90 can be retracted from the core68 when mounting the core 68 in place by means of a hand wheel 95forming part of the brace 96 pivotally connected at 97 tojthe lower endof the arm 89. I

It has been found that when two wheels 90 are operated 4 in tandem thata smoother feed can be maintained between the core 68 and the bristlefeeding assembly B, as sometimes the grooves 94 are deformed, therefore,by providing two wheels 90, one behind the other, a more constant feedis maintained.

end of the spiral groove 94. The core 68 is then rotated and thebristles are fed into the groove 94 with the rope 101 being tightlypulled into the groove 94 by the rotation of the core 68 binding thebristles 67 there- The rope 101 passes around a drum 102 whichhas abrake band 103 operating on an extension brake drum 104, the tension ofthe brake band 103 is adjusted by an adjusting screw 105. The tension ofthe brake band 103 determines the tightness of the winding of the rope101 within the groove 94 of the core 68. A friction block 106 applies atension on the rope 101 so that the rope 101 will grip the drum 102 inits operation.

The drum 102 and brake assembly are mounted upon a framework 107,mounted to the table 34 by legs 108. The drum 102 and brake assembly isjournalled to the cross shaft 109 journalled to the framework 107 onbearing blocks 110. The brake band 103 is in two parts, referring toFigures 13 and 14, pivotally connected on one side of the assembly to abracket 111 fixedly mounted to the framework 107. The bands 103 arebrought together on the opposite sides of the brake assembly by theadjusting screw depending on the amount of resistance to be offered tothe movement of the bristle binding rope 101.

Bristle guides 112 are mounted above the bristle feeding assembly B bybrackets 113, referring to Figures 3 and 10. Guards 114 are providedalong the bristle feeding assembly B to prevent the bristles 67 fromentering into the assembly in the operation of the machine W.

As the bristles 67 are wrapped within the grooves 94, they are trimmedto the proper diameter by the trimming unit T. The trimming unit Tincludes a drum-like housing 115 having a revolving cutterblade 116operat ing therein. The blade 116 is mounted on a,shaft 117 on a motor118. The upper edge of the drum 115 is cut away at 119. The ends of thebristles 67 are guided into this cut out portion by the guides 120 wherethey are trimmed as the core 68 is being revolved in the winding of thebristles 67 to the core 68. f

The trimming unit T is supported on the outer ends 43 of the rails 38and 39 by hangers 121. The h'an'gers 121 are fixedly secured to thetrimmer T at 122 and extend upwardly and horizontally at 123 passingthrough a hollow sleeve 124 where they are locked in adjusted positionby a set screw 125. This adjustment moves the trimmer T relative to thebroom core 68 in order to adjust the same to the various diameter broomsbeing rewound.

The operation of this broom winding machine W will now be described. Thehand wheel 84 of the tail stock carriage 73 is released, permitting themovement of the carriage 73 along the channel base frame 20. The handwheel 95 is operated to retrack the tandem wheels 90 away from thecenter line between the arbor shaft 69 and the tail stock 71 asufi'icient distanceto mount the broom core 68 to the arbor 69 and thechuck 82 of the tail stock 71. The tail stock carriage 73 then is movedtowards the core 68 and locked in the position shown in Figure 1 by thehand wheel 84 when the core 68 has been brought into position. Next thebristle feeding 'assembly B is moved towards the right, as viewingFigure 1, to the beginning of the groove 94 of the core 68. The tandemwheels 90 are then moved towards the core 68 into the groove 94 by thehand wheel 95.

The outer ends 43 of the rails 38 and 39 are adjusted for the properdistance from the inserted broom core 68 to properly apply the bristles67 to the core 68. This is accomplished by adjusting the hanger rods 47to either raise or lower the outer ends 43 of the bristle feedingassembly B. The position of the trimmer T is determined, depending uponthe outer diameter of the bristles 67 of the broom to be wound byloosening the set screw 125 and moving the horizontal portion 123 of thehangers 121 to the proper position for trimming the broom to be wound.

The end of the rope 101 is secured within the beginning of the groove 94conventionally. The bristles 67 are placed on the table 34, as shown inFigure 4. The bristles 67 are moved by the fingers 66 on the upper runsof the chains 54 towards the right when viewing Figures 3, 4 and 10,under the rope 101, and as the bristles 67 approach the core 68 they arepulled down into the groove 94 and as they are pulled down they enterbetween the horizontal fingers 65 of the chains 54, which continue tomove them in synehronism with the rotation of the core 68 down into thegroove 94, and as they rotate their outer ends enter the cut awayportion 119 of the trimming unit T, where the revolving cutter blade 116trims them to the proper length.

As the bristles 67 are placed on the table and fed over the chains 54,they will continue to feed into the groove 94 of the core 68 and bebound therein by the binding rope 101, and as the core 68 is revolvedthe groove 94 will move the bristle feeding assembly B towards the leftas viewing Figure 1, until the complete winding operation is finishedand the core has been completely rebristled.

As the bristles 67 are pulled down between the rails 38 and 39, they arefurther assisted by the guides 112 in arriving at the proper positionfor entering the groove 94 of the core 68. The rails or guards 114prevent the bristles 67 from re-entering the space between the rails 39after they have been applied to the core 68.

Having thus described the preferred embodiment of the invention, itshould be understood that numerous structural modifications andadaptations may be resorted to without departing from the scope of theappended claims.

What is claimed is:

l. A broom winding machine for applying bristles to a broom of the typehaving a spiral groove extending along the outer surface of acylindrical core with the bristles fastened therein by a rope secured inthe groove; comprising a stationary framework, means on said frameworkfor supporting said core adjacent the rear of said framework for rotarymovement, a carriage extending from front to rear through said frameworkand supported therein for movement parallel to the axis of said core,said carriage extending transversely of and overlying said core, a pairof conveyor chains on said carriage arranged in spaced apart convergingrelation generally transverse to the axis of said core, a pair of spacedparallel sprockets having generally horizontal axes mounted on saidcarriage supporting each of said chains, said conveyor chains slopingupwardly and rearwardly from the front portion of said carriage to therear portion thereof, a plurality of spaced parallel bristle engagingfingers secured to each of said chains with each of said fingers havinga generally horizontal leg and a generally upright leg, opposed fingerson said chains having the generally horizontal legs in substantiallyaligned inwardly projecting relation and the upright legs in generallyparallel relation, and means on said carriage and movable therewith forapplying tension to said rope during rotation of said core and guidingsaid rope along a downwardly and rearwardly sloping path between saidconveyor chains from a point above said conveyor chains to said core,said conveyor chains being adapted to support a plurality of bristlesextending transversely thereof with said upright legs of said fingersmoving said bristles toward said core, said tensioned rope being woundon said core on rotation of said core and engaging said bristlesintermediate the opposite ends thereof moving said bristles downwardlyinto a generally V-shaped form and clamping the bristles centrally inthe spiral groove of said core, said bristles disengaging from saidupright legs and simultaneously engaging the horizontal legs of saidfingers as the bristles are pulled into the generally V-shaped form bysaid rope.

2. A device as claimed in claim 1 wherein a pair of converging arms aresecured to said carriage overlying said conveyor chains for engagingbeneath the outer ends of said bristles for cooperating with said ropein applying pressure to and guiding said bristles into the groove insaid core.

3. A device as claimed in claim 1 wherein the means applying tension tosaid rope includes a drum journalled on said carriage about which saidrope is trained and means retarding the rotational movement of saiddrum.

4. A device as claimed in claim 1 wherein means are provided on saidcarried for moving said carriage laterally with respect to said core andwith said last named means having portions thereof engaging in thespiral groove in said core.

References Cited in the file of this patent UNITED STATES PATENTS199.040 Doak Jan. 8, 1878 737,381 Franz Aug. 25, 1903 2,105,334 Sculleyet al Jan. 11, 1938 2,638,277 Miller May 12, 1953 2,701,739 EnchelmaierFeb. 8, 1955 2,720,423 Seavey et al. Oct. 11, 1955 2,797,966 EnchelmaierJuly 2, 1957

